Fridge Freezer Transit BagsTransit bags not only protect your Engel fridge freezer with a layer of insulation, but they also offer a heavy duty foil layer on the inner side that reflects direct sunlight and long wave radiation. The high quality gray canvas outer layer comes with an accessory pocket and vents. The bag covers the entire unit and is easy to open simply unzip the bag on top. The bags work with the corresponding Engel Transit Slide Lok. Breathing holes are built